This home had water-based finish in the kitchen and oil-based finish everywhere else in the house.
In this case the best solution is to (dustless) sand the entire floor and then finish it all using the same polyurethane. And in this case, it turned out great.
In one area in the living room, there was a significant line in the finish caused by the sunlight and an area rug. You can clearly see this line in the image below.
Since all of the wood is finished with Bona Woodline Oil Polyurethane, all of the transitions are now seamless. The character in the white oak really pops now too!